LED Ghosting

LED Ghosting

Updated: May 25th, 3:00pm

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LED ghosting is a common issue faced by many users of LED lighting, especially when used with dimmer switches. This phenomenon can occur when LED lights flicker or glow even when they are turned off, leading to frustration for users looking to achieve complete darkness. Recently, discussions online have highlighted this issue further with various users sharing their experiences and solutions. Many experts suggest two primary fixes to address LED ghosting: 1) use a dimmer with a neutral connection, or 2) install a special capacitor across the load. However, implementing these solutions may incur additional costs and require precise installation, particularly since multiple capacitors are often needed for different light fittings. Question... Is having a neutral wire at wall switches considered standard practice in the UK? Traditionally, many have utilized loop-in wiring at the ceiling rose, utilizing only the line and switched line at the wall switch. This raises concerns, as incorporating a neutral and using a specialized dimmer could involve significant rewiring, which may not yield any tangible savings for users. Just recently, I replaced a 150-watt halogen tube with a 25-watt LED R7s tube and experienced ghosting issues. I had similar problems when switching two parallel wired ceiling light fittings to LEDs instead of the old filament lamps. In these cases, I had to replace one LED in each fitting with a standard filament bulb, which instantly resolved the ghosting effect. For those facing similar issues, a topic on this can be found here: https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num= It's worth noting that a simple capacitor, specifically a 0.47uF X1 rated for 310VAC, can effectively alleviate LED ghosting problems. This capacitor acts as a return path for electronic dimmers without neutral connections, allowing the dimmer to function correctly even when the lamp is off. This solution is an excellent option for those who either do not have a neutral available at the dimmer location or prefer not to invest in a neutral dimmer. If you're interested in learning more about effective solutions, please visit our site: led diode dip.

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